For over a decade the Alientech KESS V2 has been a go-to tool for ECU remapping professionals, offering stable and reliable performance. However, with the launch of the new Alientech KESS3 we wanted to explore the differences. This article provides a definitive technical comparison of the new Alientech KESS3 and its predecessor, the KESS V2, helping you to understand if it’s time for you to upgrade.